Fluid-controlling valve



H. E. EVANS.

FLUID CONTROLLING VALVE. APPLICATION FILED JULY 24, 1920.

1,400,944, j Patented Dec. 20, 1921.

Ha rrzswrill'a'aiw UNITED STATES PATENT OFFICE. A

MAXWELL &; MOORE, INC., 0]! NEW JERSEY.

YORK, N. 'Y., A CORPORATION OF NEW FLUID-CONTROLLING VALVE.

Application filed July 24,

To all whom it may concern:

Be it known that I, HARRISON E. EVANS, a citizen of the United States of America, and resident of Somerville, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Fluid-Controlling Valves, of which the following is a specification.

This invention relates to fluid controlling valves and more articularly to valves intended for the a mission of steam to the blower apparatus of locomotives although valves such as that forming the subject matter of this invention are of general application and not necessarily limited to an specific use.

n the employment of devices of the type referred to, it is frequently necessary to locate the valve in a restricted space, or closely adjacent other mechanical appliances, and in many cases difficulty is experienced in so connecting the valve casing as to permit the necessary are of movement of the valve handle in opening and. closing the valve or as to allow of ready accessibility to the handle.

An object of the present invention is to provide such an arrangement of parts that the valve casing may be set in position without reference to the ath of movement of the handle and where y the position of the arc of movement of the handle may subsequently be determined at will. To this end certain or all of the parts whereby angular movement of the handle is trans formed into reciprocatory movement of the valve may be so mounted relatively to the valve casing as to permit of relative angular adjustment thereof. This may conveniently be accomplished b providing supporting means for the ban le shaft, which supportin means may be adjustably secured to the valve casing in such a manner as to permit of being turned through an arc of any desired extent, together with locking means for securing and retaining said supporting means in adjusted position.

A further object of the invention is to so limit the arc of swing of the handle memher in moving the valve from closed to open position as to permit of its use in very restricted spaces and to permit a rapid movement of the valve.- This result may be obtained in accordance with one form of the invention by providin the valve spindle with a screw of steep pitch engageable with Specification of Letters Patent.

Patented Dec. 20, 1921.

1920. Serial no. 398,834.

.nection at B. 2 is the intake chamber and 3 the discharge chamber, and i is the main valve which is slidably guided within the casing and normally seats against the upper edge of a ring 5 having screw-threaded en gagement at 6 with the casing. The valve 4: is hollow, providing a chamber 7 with which the intake chamber 2 communicates by means of a passage 8, so that under normal conditions the intake pressure is maintained on the upper side of the valve 4, thus serving to hold the same in closed position against its seat. 9 is an opening in the main valve leading from the chamber 7 to the discharge chamber 3, and for closing said opening an auxiliary valve member 10 is provided. The valve member 10 forms a part of the auxiliary valve structure shown at 11, and by means of which the member 10 is fixedly secured to the lower end of a valve stem 12, which extends upwardly and axially of the neck or opening of the valve casing.

The upper open end of the valve casing is normally closed by means of a cap 13 having screw-threaded engagement with the casing at 14: and providing a bearing for the upper end of the valve stem or shaft 12. The cap 13 may if desired be provided with a stufling box 15 containing the usual packing material 16 where the valve stem emerges from the cap, to prevent leakage of fluid along the valve stem. Upon the outer end of the valve stem or shaft is mounted a lever 17, herein shown as a handle for manipulation by the operator, although it is to be understood that a mechanically actuated lever may be substituted therefor.

At a point intermediate its length, the valve stem or shaft 12 is provided with a fixed collar 18, the peripheral surface of which is provided with screw threads 19 of relatively steep or coarse pitch, the screw thus formed being preferably of the multiple-threaded type. \Vhile as herein shown the screw-thread is formed upon a collar or enlargement on the shaft this arrangement is not essential as it is to be under stood that the thread might be formed directly on the shaft, if it were found desirable to do so.

20 is a ring, internally screw-threaded for engagement with the threads 19 of the collar 18, said ring being provided with an outstanding flange .21. The flange 21 has formed therein a series of openings, herein shown as substantially radial slots spaced apart about its circumference, and 23 is a pin fixed within the upper portion of the casing 1 and projecting from the edge of the latter, said pin-being adapted to engage any of the openings 22 which may be brought in line therewith.

In the operation of the device above described with the main and auxiliary valves in closed position, as shown in Fig. 2, the operator will, by manipulating the handle 17, cause the auxiliary valve member 10 to recede from its seat, thus permitting fluid from chamber 7 to pass through the opening 9 into the chamber 3. The pressures on opposite sides of the main valve are thus unbalanced suflieiently to raise the main valve 4 from its seat, whereupon fluid is permitted to flow through the main valve opening.

By reason of the relatively steep pitch of the screw threads 19, it will be readily understood that but a slight movement of the handle 17 is required to lift the valve member 10 from its seat, and thus the are of swing of the-handle 17 is reduced to a minimum. It will also be clear that by removing the cap 13, the ring 20, together with'the .valve stem and valve, may be lifted in an axial direction sufiiciently to disengage the pin 23 from that one of the slots 22 within which it was located, whereupon the ring 20 may be turned to'any desired position and a selected one of the slots 22 engaged with the pin. The cover 13 may then be restored to normal position and the device will be in position for use as above described, the position of the handle 17 however, having been changed from that shown in Fig. 2, but without in any way affecting the normal position of the auxiliary valve.

It will thus be seen that the device may be installed in a restricted space and that by suitably positioning the ring 20 the location of the path of movement of the handle 17 may be fixed inv the most desirable position where the handle will be readily accessible and will not interfere with surrounding objects,- while the small are of movement of the handle necessary to actuate the valve reduces the clear space necessary for its manipulation to a minimum;

I claim:

1. A valve device comprising, in combination, a valve stem, a collar thereon having a screw-thread upon its periphery, a nut en gaging said threaded collar, said nut'havin a plurality of spaced openings therein, fixed pin for engaging a selected one of said openings, and a cover member constructed and arranged to be brought into clamping enga ement with said nu I 2. In a valve device, in combination, a valve stem having a screw-threaded collar thereon, a nut engaging said collar and provided with a radial flange, said flange having a series of radially extended spaced slots therein, a relatively fixed member for engagement with a selected one of said slots, and a cover member constructed and arranged to be brought into clamping engagement with said flange.

3. In combination, in a valve device, an open-ended valve casing, a valve therein, a stem for said valve extending axially of the open end of the casing, a ring supported upon the edge of said casing and internally screw threaded, a peripherally threaded collar fixed to said stem and engaging said ring, a stop pin for holding said ring in angular position ofadjustment relatively to said casing, and means for holding said ring in engagement with the casing.

4. In a device of the class described, a valve having a stem connected thereto, a

casing therefor provided with an open end having an annular edge, a ring member en-' gaging w1th1n the open end of said casing,-

a peripheral flange outstanding from said ring and resting upon the upper edge of said casing, said flange being provided with spaced radial slots, apin fixed in the edge of said casing and arranged for. engagement with a selected one of said notches, and a member carried by said stem and contacting IZvith the interior surface of said ring mem- 5. A valve device of the type described, having in combination an open ended casing, a valve stem extending axially of the open end of said casing and provided with a screw-threaded portion, a nut engaging said screw-threaded portion, a radial flange on said nut having a series of spaced openings therein, a fixed pin outstanding from the end of said casing and positioned for engagement with a selected one of said openings, and a cap having a bearing for said valve stem, said cap being constructed .and arranged for threaded engagement with the upper end of said casing and to clampingly engage said flange.

I Signed by me at Boston, Massachusetts, this 22nd day of July, 1920.

HARRISON E. EVANS. 

